IGCSE Chemistry (0971) — May–June 2024, Paper 22
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Which gas has the slowest rate of diffusion? A H2 B NH3 C CH4 D CO2
Answer this question and get it marked →Which statements about the position of the elements in the Periodic Table are correct? 1 Elements in the same group have similar chemical properties. 2 Elements in the same period…
Answer this question and get it marked →Which statements about isotopes are correct? 1 Isotopes are atoms of different elements with the same number of protons. 2 Isotopes of the same element have the same chemical…
Answer this question and get it marked →Which diagram shows the arrangement of the outer shell electrons in a molecule of water? Four dot-and-cross diagrams A-D show H-O-H with varying bonding pairs and lone pairs; the…
Answer this question and get it marked →The structures of three substances 1, 2 and 3 are shown (e.g. a simple molecular structure, a giant covalent / diamond-like structure and a giant ionic / metallic lattice). Which…
Answer this question and get it marked →Information about four substances, W, X, Y and Z, is shown (melting point / degrees C, electrical conductivity): W 1710, does not conduct when solid; X 3500, conducts when solid;…
Answer this question and get it marked →The structure of glycine is shown (H2N-CH2-COOH). Which row is correct? Columns: formula of glycine, number of different elements in glycine. A CH5O2N, 10 B C2H5O2N, 4 C C2H5O2N,…
Answer this question and get it marked →The incomplete equation for photosynthesis is: wCO2 + xH2O - P + yO2. Compound P is a product of the reaction. Which row describes the values of w, x and y and gives the empirical…
Answer this question and get it marked →The concentration and volume of an aqueous alkali are known. Which additional information is required to calculate the number of moles of acid needed to neutralise the aqueous…
Answer this question and get it marked →Which statement about electrolysis is correct? A Electrons move through the electrolyte from the cathode to the anode. B Electrons move in the external circuit towards the…
Answer this question and get it marked →Aqueous copper(II) sulfate is electrolysed using copper electrodes. What is the half-equation for the reaction at the cathode? A 2H+ + 2e- - H2 B 4OH- - O2 + 2H2O + 4e- C Cu -…
Answer this question and get it marked →Three statements about activation energy, Ea, are listed. 1 Colliding particles must have at least Ea before they can react. 2 Ea for exothermic reactions is always greater than…
Answer this question and get it marked →A student adds excess magnesium ribbon to 10 cm3 of 0.5 mol/dm3 sulfuric acid. The hydrogen gas produced is collected and its total volume measured every 10 seconds. The…
Answer this question and get it marked →The equation represents the reversible reaction between ethene and steam: C2H4(g) + H2O(g) <- C2H5OH(g), deltaH is negative. Which row describes the conditions that produce the…
Answer this question and get it marked →Which row identifies the pressure and the catalyst used for the conversion of sulfur dioxide to sulfur trioxide in the Contact process? Columns: pressure / atm, catalyst. A 2,…
Answer this question and get it marked →Which equation represents a redox reaction? A AgNO3 + NaCl - AgCl + NaNO3 B PCl5 + 4H2O - H3PO4 + 5HCl C 3Fe + 4H2O - Fe3O4 + 4H2 D MgCO3 + 2HCl - MgCl2 + CO2 + H2O
Answer this question and get it marked →The equation for the reaction between aluminium and copper(II) oxide is: 2Al + 3CuO - Al2O3 + 3Cu. Which statements about this equation are correct? 1 The oxidation number of the…
Answer this question and get it marked →What is the colour of thymolphthalein in dilute hydrochloric acid? A blue B red C yellow D colourless
Answer this question and get it marked →Two acids, P and Q, with the same concentration and volume are reacted separately with the same mass of magnesium ribbon. The reactions produce the same total volume of hydrogen…
Answer this question and get it marked →Which process is not used in the preparation of an insoluble salt? A filtration B washing C crystallisation D drying
Answer this question and get it marked →Lithium and potassium are metals in Group I of the Periodic Table. Lithium has a melting point of 181 degrees C and a density of 0.53 g/cm3. Which row describes the melting point…
Answer this question and get it marked →Which statements about transition elements are correct? 1 They have a low density. 2 They form ions with variable oxidation numbers. 3 They have a high melting point. 4 They form…
Answer this question and get it marked →Which statements describe the elements in Group VIII of the Periodic Table? 1 Their atoms have full outer electron shells. 2 They are unreactive metals. 3 They are monatomic…
Answer this question and get it marked →Four metals, Q, R, S and T, are each added to separate samples of water, steam and dilute hydrochloric acid. Results (observation with water, with steam, with dilute hydrochloric…
Answer this question and get it marked →Metal X acts as a sacrificial metal to prevent iron from corroding. Metal X does not act as a sacrificial metal to prevent aluminium from corroding. What is X? A copper B…
Answer this question and get it marked →Which equation represents the reduction of a compound found in hematite in the blast furnace? A 2Al2O3 - 4Al + 3O2 B CaO + SiO2 - CaSiO3 C 2FeO + CO - Fe2O3 + C D Fe2O3 + 3CO -…
Answer this question and get it marked →Which statements about the treatment of domestic water supplies are correct? 1 Filtration is used to remove insoluble substances from the water. 2 Sedimentation is used to remove…
Answer this question and get it marked →Which statement about water is correct? A It turns anhydrous copper(II) sulfate from pink to blue. B It turns anhydrous copper(II) sulfate from white to blue. C It turns…
Answer this question and get it marked →Cupronickel is used to make coins. The arrangement of atoms in cupronickel is shown (copper atoms and nickel atoms in a single lattice). Which kind of substance is cupronickel? A…
Answer this question and get it marked →Which physical properties are typical of all metals? 1 good heat conductivity 2 low density 3 malleability A 1 and 2 B 1 and 3 C 2 and 3 D 3 only
Answer this question and get it marked →Which oxide is used to neutralise acidic gases in flue gas desulfurisation? A calcium oxide B carbon dioxide C nitrogen oxide D sulfur dioxide
Answer this question and get it marked →Some information about three gases, P, Q and R, is listed: Gas P forms when magnesium reacts with dilute hydrochloric acid; Gas Q makes up 78% of the air; Gas R forms when gas P…
Answer this question and get it marked →Which formula represents an alkene? A CH4 B C2H4 C C2H6 D C2H5OH
Answer this question and get it marked →The structures of two compounds used to make an ester are shown: CH3CH2COOH (propanoic acid) and CH3CH2OH (ethanol). What is the name of the ester? A ethyl propanoate B propyl…
Answer this question and get it marked →Which statement about a homologous series is correct? A All members have the same general formula. B All members have the same molecular formula. C All members have similar…
Answer this question and get it marked →Which statements about aqueous ethanoic acid are correct? 1 It contains the functional group -COOH. 2 It reacts with carbonates to produce hydrogen. 3 It turns universal indicator…
Answer this question and get it marked →Alkenes react with steam in an addition reaction. Some alkenes produce only one alcohol product; some produce two different alcohols which are structural isomers. Which row gives…
Answer this question and get it marked →What is an advantage of manufacturing ethanol by fermentation rather than by the addition of steam to ethene? A No gases that cause global warming are produced. B The ethanol that…
Answer this question and get it marked →The diagram shows the structure of a polymer (a repeating unit with -C(=O)-O- ester linkages and CH3 / H side groups). Which structure represents the monomer for this polymer?…
Answer this question and get it marked →Which piece of apparatus is used to measure 24.5 cm3 of gas produced during a reaction? A beaker B conical flask C measuring cylinder D volumetric pipette
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